Please can the community assist me with how to correctly configure the Send/Receive Biztalk action, to retrieve data from Biztalk. I only need to retrieve data, not send.

I need to use the Send/Retrieve Nintex workflow action to get data from Biztalk. I created variables to store the values retrieved. I am using the Retrieve part of the action only because I only need to get data back. Does the Xml Namespace need to be changed? What exactly needs to be done, how does this action need to be configured if you are only trying to get data back from Biztalk?